Contents

unless Array.method_defined? :shuffle
  class Array
    def shuffle
      dup.shuffle!
    end

    # Standard in Ruby 1.8.7+. See official documentation[http://ruby-doc.org/core-1.9/classes/Array.html]
    def shuffle!
      raise TypeError, "can't modify frozen array" if frozen?
      size.times do |i|
        r = i + Kernel.rand(size - i)
        self[i], self[r] = self[r], self[i]
      end
      self
    end
  end
end

Version data entries

73 entries across 73 versions & 5 rubygems

Version	Path
backports-3.6.7	lib/backports/1.8.7/array/shuffle.rb
backports-3.6.6	lib/backports/1.8.7/array/shuffle.rb
backports-3.6.5	lib/backports/1.8.7/array/shuffle.rb
backports-3.6.4	lib/backports/1.8.7/array/shuffle.rb
backports-3.6.3	lib/backports/1.8.7/array/shuffle.rb
backports-3.6.2	lib/backports/1.8.7/array/shuffle.rb
backports-3.6.1	lib/backports/1.8.7/array/shuffle.rb
scout_realtime-1.0.5	lib/vendor/backports-3.3.5/lib/backports/1.8.7/array/shuffle.rb
scout_realtime-1.0.4	lib/vendor/backports-3.3.5/lib/backports/1.8.7/array/shuffle.rb
scout_realtime-1.0.3	lib/vendor/backports-3.3.5/lib/backports/1.8.7/array/shuffle.rb
scout_realtime-1.0.3.pre	lib/vendor/backports-3.3.5/lib/backports/1.8.7/array/shuffle.rb
scout_realtime-1.0.2	lib/vendor/backports-3.3.5/lib/backports/1.8.7/array/shuffle.rb
scout_realtime-1.0.1	lib/vendor/backports-3.3.5/lib/backports/1.8.7/array/shuffle.rb
scout_realtime-1.0.0	lib/vendor/backports-3.3.5/lib/backports/1.8.7/array/shuffle.rb
scout_realtime-0.5.5	lib/vendor/backports-3.3.5/lib/backports/1.8.7/array/shuffle.rb
scout_realtime-0.5.5.pre	lib/vendor/backports-3.3.5/lib/backports/1.8.7/array/shuffle.rb
scout_realtime-0.5.4	lib/vendor/backports-3.3.5/lib/backports/1.8.7/array/shuffle.rb
backports-3.6.0	lib/backports/1.8.7/array/shuffle.rb
backports-3.5.0	lib/backports/1.8.7/array/shuffle.rb
backports-3.4.1	lib/backports/1.8.7/array/shuffle.rb